Kyung Hee University · Engineering
Professor Je Seung Lee's research lab specializes in the design and synthesis of advanced functional materials, with a primary focus on ionic liquids, porous carbons, and nanomaterials for energy and environmental applications. The lab develops innovative, template-free, and solventless methods to produce nitrogen- and boron-doped porous carbons with tunable porosity and high surface areas, enabling high-performance materials for CO₂ capture, electrocatalysis, and energy storage. A key research direction involves leveraging the unique properties of task-specific ionic liquids to create self-assembled ionic liquid crystals and ionogels that enhance ionic conductivity, as well as integrating nanomaterials like TiO₂ and conductive polymers for non-enzymatic biosensing. The lab’s work bridges materials chemistry, electrochemistry, and sustainable technology development.
Figures are computed from collected data and may differ slightly.
An expedient, template-free, high-yield, and solventless route to nitrogen-rich micro- and mesoporous carbons is reported based on direct, atmospheric-pressure carbonization of task-specific ionic liquids bearing one or more nitrile side chains. The resulting textural properties (pore regime, surface area) are highly dependent upon the structural motifs of the ions comprising the corresponding parent ionic liquid, and uniform carbon films are routinely deposited with this novel methodology, high
A new strategy for the preparation of functional porous carbons is developed via direct, ambient-pressure, thermal pyrolysis of task-specific ionic liquids (ILs). The simple synthesis lies in the synergistic use of the negligible volatility of the ILs and incorporation of the crosslinkable nitrile groups in the anions. The resulting carbon materials at 800 °C retain an extremely high content of nitrogen (up to 18 at%). Carbon materials are central to many important applications because of their
A novel strategy for tailoring the adsorption and structural properties of ionic liquid derived carbons has been developed. By changing the carbonization temperature and ratios of ionic liquids (ILs) containing a cross-linkable anion, such as 1-butyl-3-methylimidazolium tricyanomethanide [BMIm][C(CN)(3)] and 1-ethyl-3-methylimidazolium tetracyanoborate [EMIm][B(CN)(4)], boron and nitrogen-rich carbons with slit-like pores and specific surface areas exceeding 500 m(2) g(-1) have been prepared. Fu
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCation Cross-Linked Ionic Liquids as Anion-Exchange MaterialsJe Seung Lee, Huimin Luo, Gary A. Baker, and Sheng Dai*View Author Information† Chemical Sciences Division and‡ Nuclear Science and Technology Division Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831*Corresponding author. E-mail: [email protected]Cite this: Chem. Mater. 2009, 21, 20, 4756–4758Publication Date (Web):September 28, 2009Publication History Received25 August 2009Re
A novel ionic mixture of an imidazolium-based room-temperature ionic liquid containing ethylene-oxide-functionalized phosphite anions is fabricated, which, when doped with lithium salt, self-assembles into a smectic-ordered ionic liquid crystal through Coulombic interactions between the ion species. Interestingly, the smectic order in the ionic-liquid-crystal ionogel facilitates ionic transport.
This study proposes a non-enzymatic glucose sensor fabricated by synthesizing high-purity TiO<sub>2</sub> nanoparticles in thermal plasma and depositing it directly on a substrate and then depositing chitosan-polypyrrole (CS-PPy) conductive polymer films by electrochemical method. The structural properties of the deposited TiO<sub>2</sub> nanoparticles were analyzed by X-ray diffraction (XRD) and dynamic light scattering (DLS) system. The chemical composition and structural properties of the TiO
Bioelectrodes mediated by metal oxide nanoparticles have facilitated the development of new sensors in medical diagnosis. High-purity TiO<sub>2</sub> nanoparticles (NPs) were synthesized through thermal plasma and deposited directly on an interdigitated electrode. The surface of the TiO<sub>2</sub>-deposited electrode was activated with (3-aminopropyl) triethoxysilane (APTES) followed by fixing the single-stranded probe deoxyribonucleic acid (DNA) to fabricate the DNA biosensor. The structural p
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